Wrench.



R. B. FERGUSON.

WRENCH.

APPLICATION man FEB. 20. 1911.

1 ,Q%6,000. I Patented Nov. 6, 1917.

V mounted on worm shaft 13.

UNITED STATES PATENT OFFICE.

ROBERT B. FERGUSON, 0]? LOS ANGELES, CALIFORNIA, ASSIGNOR TO UNIVERSAL TOOL 00., 0F LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA. Y

WRENCH.

Specification of Letters Patent.

Application filed. February 20,1917. Serial No. 149,929. j y I To all whom it may concern:

Be it known that I, ROBERT B. FERGUSON, a citizen of the United States, residing at the city of Los Angeles, county of Los' Angeles, State of California, have invented new and useful Improvements in .Wrenches, of which the following is a specification.

My invention relates to an adjustable wrench which is primarily designed for use on pipes but may also be used for nuts, and the object thereof is to produce a more positive and efficient wrench when used for pipes than any with which I am acquainted.

In the drawings forming a part of this application:

Figure 1 is a side elevation of the wrench adapted for use on nuts.

Fig. 2 is a side elevation of the wrench adapted for use on pipes.

Fig. 3 is a section on the lines 3-3 of bending sheet metal into U shape with the outer side portions of the inner jaw an integral part thereof, thereby forming a trough in the handle. Between the outer side portions of the inner jaw is a spacing block 7 which is secured to the outer portions by rivet 8 and with said outer portions forms the inner jaw. The outer jaw 9 has a shank 10 which is slidably mounted in and passes into the handle below the spacing block. On the outer edge of this shank are rack teeth 11 which are engaged'by worm 12 revolubly Shaft 13 is pivotally mounted at one endin jaw 6 by rivet 20 and slides through a guide plate 14 secured upon the inner end of shank 10 by screw 15. Secured to the handle is a spring 16 best shown in dotted lines in'Fig. 2, which normally holds the shank of the outer jaw in the position shown in Fig. 2 when the wrench is used as a pipe wrench. Pivotally mounted in the handle is a latch 17 which has ahole in the free end thereof. This latch is slipped over the end of the worm shaft as shown in Fig. 1 when the wrench is used on nuts and holds the jaws with their faces parallel. Jaw plates 18 having Copies of this patent may be obtained for Patented Nov 6, '2.

teeth 19 are removably connected to the jaws so they may be tempered. It will be observed that when the wrench is grasped by the hand of the operator the thumb and finj ger are in position to rotate the worm to adjust the opening between the-jaws to receive either a pipe or a nut. If the wrench is being used as a pipe wrench'the jaws are adjusted to contact with the pipe. The operator then'can-press upon the worm shaft with his fingers and thereby cause the teeth to grip the pipe and that if it is desired to turn the pipe backward by gripping the worm shaft firmly the pipe can be turned back.

Havingdescribed my invention, what claim is: v

1. A wrench comprising an inner j aw having a handle U-shaped in cross-section; an outer jaw having a shank slidably mounted in the handle, the inner end of said shank being adapted to move into and out of the trough in the handle, said shank having rack teeth on the outer edge thereof; a guide plate on'the inner end of said shank, said plate having a holein its outer end; a worm shaft pivotally connected to the inner jaw and having its inner end passing throughthe hole in the guide plate; a worm revolubly mounted on said shaft; and a spring secured to the handle adapted to move the inner end of the said shank. outwardly. I

'2. Awrench comprising an inner jaw having a handle U-shaped in cross-section; an outer jaw having a shank slidably mounted in the handle, said shank having rack teeth on the outer edge thereof; a guide plate on the inner end of said shank, said plate having a hole in its outer end; a worm shaft pivotally connected to the inner jaw and having its inner end passing through the hole in the guide plate; a worm revolubly mounted onsaid shaft; and a spring secured to the handle; and a latch pivotally mounted in the'handl'e and adapted to be passed over the end of the worm shaft and thereby hold the jaws with their faces parallel.

In witness that I claim the foregoing I have hereunto subscribed my name this 6th day of February 1917. v v w ROBERT ejrnnouson.

five cents each, by addressing the Commissioner of Patents Washington, D. 0. 7 

